• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

LDS Won't + 10% Fill Plus Rated Tank?

Discussion in 'Tanks, Valves and Bands' started by Dubious, Jul 10, 2020.

  1. Dubious

    Dubious ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Wisconsin
    285
    166
    43
    Long story short. I have 4 lp tanks. 2 LP72 and 2 LP95 are not plus rated (I didn't know this was a thing when I picked them up). 2 LP72's that were just hydroed came back plus rated. I pointed to the plus rating but was told that a tank can only be plus rated for the first 5 years from its birth? He also said the hydro tester they used should have not plus rated them? Is he completely mistaken or did I miss something about plus ratings on scubaboard?
     
  2. Wookie

    Wookie Secret Field Agent ScubaBoard Business Sponsor

    28,128
    44,678
    113
    He’s right and wrong. If the cylinder isn’t rated for a + rating, one cannot be assigned. But if it was assigned a + rating at manufacture, it may be maintained.

    So your plus rating is no good because the cylinders were never assigned one. What are the steel 95’s? I’ve never heard of one without a + rating?

    Here is a good thread.... 10% overfill / Plus + rating on Steel LP tanks
     
    Sam Miller III, Johnoly and abnfrog like this.
  3. davehicks

    davehicks ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Seattle
    484
    344
    63
    If you are stressing about overfilling your tanks it is time for a bigger tank. And maybe a pony bottle if you think you might be pushing it in to the red.
     
    gizmo1972 likes this.
  4. Dubious

    Dubious ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Wisconsin
    285
    166
    43
    The original date is plus rated on all four tanks or is there something I missing.

    72 in question

    IMG_09241-scaled-e1594428282219.jpg

    IMG_09251-scaled-e1594428305238.jpg

    Here is one of the 95's. Never plus rated after the original date

    IMG_09261-scaled.jpg

    One of the 72's that were not plus rated.

    IMG_09271-scaled-e1594428243198.jpg


    Not the issue at all. I just was under the impression the plus +10% is how you actually got the rated cubic feet. So my lp95 will never be 95 due to no plus rating on last hydro. I actually like the 72's. They were great when we had a babysitter for a limited time so a quick 45 minute dive with the lp72 works out well. I have been looking for more locally.
     

    Attached Files:

  5. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
    3,998
    1,726
    113
    2airishuman likes this.
  6. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
    3,998
    1,726
    113
    @Dubious you should also see if you can get the records for the testing on the lp95s to see if they actually failed the criteria for the plus per the REE or if the shop just didn't have the info
     
    AfterDark likes this.
  7. Wookie

    Wookie Secret Field Agent ScubaBoard Business Sponsor

    28,128
    44,678
    113
  8. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
    3,998
    1,726
    113
    the REE can be calculated per CGA C-5 if you were suitably inclined like @Luis H
     
    AfterDark and Boston Breakwater like this.
  9. Wookie

    Wookie Secret Field Agent ScubaBoard Business Sponsor

    28,128
    44,678
    113
    Ah. I had no idea. Always good to learn a thing

    I just bought hp cylinders instead. The weight to gas ratio on low pressure cylinders is not in my favor.
     
    AfterDark likes this.
  10. runsongas

    runsongas Great White

    # of Dives: 500 - 999
    Location: California - Bay Area
    3,998
    1,726
    113
    if you don't cave fill then yes
     

Share This Page